Update runtime files.

runtime/doc/if_pyth.txt

@@ -857,7 +857,7 @@ You can test what Python version is available with: >
 	if has('python')
 	  echo 'there is Python 2.x'
 	endif
-  	if has('python3')
+	if has('python3')
 	  echo 'there is Python 3.x'
 	endif
 
@@ -874,7 +874,7 @@ python support: >
 	    echo 'Python 2.x dynamically loaded'
 	  endif
 	endif
-  	if has('python3_compiled')
+	if has('python3_compiled')
 	  echo 'compiled with Python 3.x support'
 	  if has('python3_dynamic')
 	    echo 'Python 3.x dynamically loaded'